Rotex RHYKOMB33AA Installer's Reference Guide

13 Troubleshooting
Installer reference guide
83
RVLQ05+08CAV4 + RHYHBH05AA + RHYHBH/X08AA +
RHYKOMB33AA
ROTEX HPU hybrid
4P355635-1 – 2013.05
13.3.6 Symptom: The space is NOT sufficiently
heated at low outdoor temperatures
Possible causes Corrective action
Gas boiler operation is not
activated
Check and make sure that:
▪ The gas boiler is switched On
and is NOT in standby mode.
▪ The communication cable
between the gas boiler and the
indoor unit is properly
mounted.
▪ There is no error code on the
gas boiler display.
The gas boiler equilibrium
temperature has not been
configured correctly
Increase the “equilibrium
temperature” to activate gas
boiler operation at a higher
outdoor temperature. Go to:
▪ [A.5.2.2] > Installer settings >
Heat sources > Boiler >
Equilibrium temp. OR
▪ [A.8] > Installer settings >
Overview settings [5-00]
Too much heat pump capacity is
used for heating domestic hot
water (applies only to
installations with a domestic hot
water tank)
Check and make sure that the
“space heating priority” settings
have been configured
appropriately:
▪ Make sure that the “space
heating priority status” has
been enabled. Go to [A.8] >
Installer settings > Overview
settings [5-02]
▪ Increase the “space heating
priority temperature” to
activate backup heater
operation at a higher outdoor
temperature. Go to [A.8] >
Installer settings > Overview
settings [5-03]
13.3.7 Symptom: The pressure at the tapping
point is temporarily unusual high
Possible causes Corrective action
Failing or blocked pressure relief
valve.
▪ Flush and clean the complete
tank including the piping
between pressure relief valve
and the cold water inlet.
▪ Replace the pressure relief
valve.
13.3.8 Symptom: Tank disinfection function is
NOT completed correctly (AH-error)
Possible causes Corrective action
The disinfection function was
interrupted by domestic hot water
tapping
Program the start-up of the
disinfection function when the
coming 4 hours NO domestic hot
water tapping is expected.
Possible causes Corrective action
Large domestic hot water tapping
happened recently before the
programmed start-up of the
disinfection function
When the Domestic hot water >
Type > Reheat or Reheat +
sched. is selected, it is
recommended to program the
start-up the disinfection function
at least 4 hours later than the last
expected large hot water tapping.
This start-up can be set by
installer settings (disinfection
function).
When the Domestic hot water >
Type > Scheduled only is
selected, it is recommended to
program a Storage eco 3 hours
before the scheduled start-up of
the disinfection function to
preheat the tank.
13.3.9 Symptom: Boiler abnormality detection
(HJ-11 error)
Possible causes Corrective action
Communication cable problem Mount the communication cable
between the gas boiler and the
indoor unit properly.
Boiler error Check the boiler display for error
information.
13.3.10 Symptom: Boiler/hydrobox combination
abnormality
Possible causes Corrective action
Boiler/hydrobox mismatch Make sure that the . setting is
the following for:
▪ 0=for RHYHBH05 +
RHYHBH08
▪ 1=for RHYHBX08
Incompatibility of software Update the boiler and hydrobox
software to the latest version.
13.3.11 Symptom: The burner does NOT ignite
Possible causes Corrective action
Gas tap is closed. Open the gas tap.
Air in the gas tap. Remove air from the gas pipe.
Gas supply pressure too low. Contact the gas supply company.
No ignition. Replace the ignition electrode.
No spark. Ignition unit on gas
valve faulty.
▪ Check the cabling.
▪ Check the spark plug cap.
▪ Replace the ignition unit.
Gas/air adjustment NOT correctly
set.
Check the adjustment. See "To
check the carbon dioxide
setting" on page 71.
Fan faulty. ▪ Check the wiring.
▪ Check the fuse. If necessary,
replace the fan.
Fan dirty. Clean the fan.
Gas valve faulty. ▪ Replace the gas valve.
▪ Re-adjust the gas valve, see
"To check the carbon dioxide
setting" on page 71.

Rotex RHYKOMB33AA Specifications

General

Brand	Rotex
Model	RHYKOMB33AA
Category	Boiler
Language	English